智能放疗云平台在肝脏结构自动勾画中的应用

目的测试并定量评估智能放疗云平台(RAIC.OIS)软件自动勾画腹部肿瘤患者肝脏结构的可行性。方法选取我院2018年2月至11月收治的20例腹部肿瘤患者的定位CT图像进行回顾性研究。使用连心医疗的RAIC.OIS软件,对CT图像中的肝脏结构行自动勾画,所得结果与手工勾画肝脏结构进行比较。通过体积偏差(ΔV%)、质心偏差(Deviation of Centroid,DC)、Dice相似性指数(Dice Similarity Coefficient,DSC)和勾画时间,比较自动与手工勾画在体积、位置、形状、用时等方面的差异。使用敏感性指数(Sensitivity Index,SI)、包容性指数(Inclusiveness Index,IncI)和Jaccard系数(Jaccard Index,JAC)对自动勾画软件的准确性和效率进行定量化评估。结果比较自动和手工两种方式勾画肝脏结构,ΔV%为(2.16±3.59)%,DSC为0.92±0.02,DC为(0.38±0.35)cm,SI为0.93±0.02,IncI为0.91±0.03,JAC为0.85±0.04。自动勾画时间为(4.4±0.4)s,手工勾画时间为(507±74)s。结论使用RAIC.OIS软件对腹部肿瘤放疗患者的肝脏结构进行自动勾画,能够达到较好的准确性,且能够有效节约勾画时间,提高放疗工作效率。

Application Study of the RAIC.OIS in Automatic Delineation of the Structure of Liver for Patients with Abdominal Tumor

Objective To test and evaluate the feasibility of the RAIC.OIS software in automatic delineation of the liver for patients with abdominal tumor.Methods The planning CT images of twenty patients with abdominal tumor enrolled from February to November 2018 were studied retrospectively.The structure of liver was automatically delineated in the CT images by the RAIC.OIS software of LINKING MED for each patient.Then,comparison between the automatic and manual delineation were made.The differences in volume,position,shape,and time using were assessed between the automatic and manual delineation by the differences in volume(ΔV%),deviation of centroid(DC),dice similarity coefficient(DSC),and delineation time.The accuracy and efficiency of the automatic delineation software were quantitatively evaluated by Sensitivity index(SI),inclusiveness index(IncI)and Jaccard coefficient(JAC).Results TheΔV%,DSC and DC between the automatic and manual delineation were(2.16±3.59)%,0.92±0.02,and(0.38±0.35)cm respectively.SI was(0.93±0.02),IncI was(0.91±0.03),JAC was(0.85±0.04),respectively.The time of automatic delineation and manual delineation were(4.4±0.4)s,(507±74)s respectively.Conclusion By using the RAIC.OIS software for automatic delineation of liver for patients with abdominal tumor,it could achieve good delineation accuracy and time saving.Thus the radiotherapy working efficiency could be improved effectively by using the software.